Preparation



ris

NITED STATES PATENT Orrree o MOSES H. DAY, OF ROXBURY, MASSACHUSETTS.

PREPARATION, MANUFACTURE, AND TREATING 0F YARN, HEMP, AND OTHERMATERIALS EMPLOYED IN THE MANUFACTURE OF CORDAGE.

SPECIPICATIQN forming part of Letters Patent No.320,763, dated June 23,1885.

Application filed May 5, 1855. (No specimens.)

To all whom, it may concern.-

Be it known that I, MosEs H. DAY, a citizen of the United States,residing at Roxbury, in the county of Suffolk and State ofMassachusetts, have invented certain new and useful Improvements in thePreparation, Manufacture, and Treating of Yarn, Hemp, and otherMaterials Employed in the Manufacture of Cordage, Hope, and Cables intheir various forms; and I do hereby declare that the following is afull, true, and exact description of the invcntion,which will enableothers skilled in the art to which it appertains to make and use thesame.

In the manufacture of cables, rope, and cord age in their differentforms it has long been the custom to use fibrous material, hemp andyarns saturated with pine or fir tar, in order to render the rope orcordage water-proof and preserve the material from decay. It has alsobeen well known that the tarred yarn, so pre pared for manufacture,becomes dry and stiff if exposed to the atmosphere, owing to theevaporation of the essential oil of tar, which takes place rapidly. Thisstiffness in the yarn is more apparent in cold weather, because the tar,thick and partly fluid at ordinary tem peratures, then becomessolidified.

It is desirable on many accounts that the quantity of tar used in therope should beas great as may be, and that the yarn or cordage may bemanipulated and worked at any temperature.

I am aware that fibrous matters have been treated with a preservativecomposed of about equal weight of fir-tar and naphtha, and I do not,therefore, claim this process as part of my invention. This process,among other drawbacks, reduces the weight of tar about one-half.

I am also aware that a compound composed of certain oils, and of tar orpitch deprived of their mueilage and superabundant acid, or of anyresinous matter whatever deprived of its mucilage and superabundantacid, has been used; but my compound contemplates the use of tar in itsnatural state, and the combination with an oil never before used forthis purpose, and in a different and much less proportion than any thathas been heretofore used, thereby gaining the maximum of tar with theminimum of any other ingredient.

I am also aware that the compounds previously spoken of were used topreserve cordage in hot climates, and not for the purpose of renderingmore easy their manipulation and manufacture in low teniiperature.

I have also discovered by my experience that the vegetable oils are notand cannot be regarded as equivalents in their action upon tar in theprocess of the making of rope and cordage. Neither do the vegetable oilsact as the equivalents of any of the animal oils.

My invention consists of the use of thenonsiccative cotton-seed oil,which does not, like the other oils, become thick or solid at lowtemperatures, and which mixes more intimately with the tar, and does notseparate from it and rise to the surface of the compound. Neither doesit absorb oxygen from the air, leaving a gummy, sticky residue, as dolinseed and other like oils. Nor does it volatilizc as do the essentialoils, or oil of turpentine, tar, 85c. Nor does it contain undissolvedparticles of fatty matter, as do the animal or fish oils, which do notproduce a like softness in tarred yarn when used in small quantities;nor mix intimately with the tar when used in larger quantities, andwhich-are expressed from the yarn when subjected to the pressure andstrain incident torope-making, and which leave the cordage thus madewith a greasy and dull appearance, and without the luster and brightnessthat is so desirable.

I apply my compound to the yarn, hemp, or other material during theprocess of manufacture by saturation or manipulation in any of the waysusually adopted in the treatment of such materials with tar inrope-making; or the material may be saturated before it is needed foruse, and be kept in that condition till needed.

After careful experimentl have found that the best results can beobtained by the use of about two per cent. of cotton-seed oil andninety-eight per cent. of the tar, though this proportion may beslightly changed on account of some variation in the state of the tar orthe temperature at which the mixture is made or is to be used. Old'tarrequires more, and

2. The within-described process of treating yarn, hemp, and othermaterials used in the 15 manufacture of ordage and rope in their variousforms, the same consistingin saturating the said material with a compound of, substantially, two per cent. of cotton-seed oil andninety-eight per cent. of tar, as set forth.

MOSES H. DAY.

Witnesses:

GEQRGE H. BRODHEAD, JOHN E. A. HUssEY.

